2.6.0-test9 /-mm3 SATA siimage - bad disk performance

2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Marcus Hartig]

Hello all,

with the Fedora 1 kernel 2.4.22-1.2115.nptl I get with hdparm -t
(Timing buffered disk reads) 34 MB/sec. Its very slow for this drive.

With 2.6.0-test9 and -mm3 I get around "62 MB in 3.05 = 20,31". Wow"
Back to ~1998?

UDMA6 is always on. The Abit NF7-S V2 nForce2 board with an siimage 
3112a (rev2) raid controller, new BIOS.

Also with the Seagate SATA V ST380023AS I get heavy crashes with 
max_kb_per_request when I set it to 128 (all kernel). With 15kb its fine 
and stable, but so slow.

The Seagate technical support means in an email to me, that there are no 
problems with the SATA seagate drives, its only the driver ... Nice. Is 
that really so? And why get other users with new Maxtor or Western 
Digital SATA drives (in the same class) much better performance?

Thanks for all the good work,

Marcus

-- 
from the "Old Europe"

Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Prakash K. Cheemplavam]

Marcus Hartig wrote:

> Hello all,
> 
> with the Fedora 1 kernel 2.4.22-1.2115.nptl I get with hdparm -t
> (Timing buffered disk reads) 34 MB/sec. Its very slow for this drive.
> 
> With 2.6.0-test9 and -mm3 I get around "62 MB in 3.05 = 20,31". Wow"
> Back to ~1998?

I have a similar problem: With 2.4.22-ac3 I had 37mb/sec with my Samsung 
HD and 49MB/sec with IBM/Hitachi, now with 2.6 (all I tried, including 
test9-mm2) I had only 20mb/sec for Samsung and about 39mb/sec for the 
IBM. Motherboard is Abit NF7-S Rev2.0, as well, so same situation with 
the siimage 1.06 driver. I wanted to run some dd tests as well, but it 
is a real performance hit. Playing with readahead or other hdparm 
options didn't help either.

Prakash

Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Marcus Hartig]

Prakash K. Cheemplavam wrote:

> I have a similar problem: With 2.4.22-ac3 I had 37mb/sec with my Samsung 
> HD and 49MB/sec with IBM/Hitachi, now with 2.6 (all I tried, including 
> test9-mm2) I had only 20mb/sec for Samsung and about 39mb/sec for the 
> IBM. Motherboard is Abit NF7-S Rev2.0, as well, so same situation with 
> the siimage 1.06 driver. I wanted to run some dd tests as well, but it 
> is a real performance hit. Playing with readahead or other hdparm 
> options didn't help either.

I get a tip from Mark Hahn to set the pci latency to 64. And wow, with 
fedora 2.4.22 kernel I get then 41MB/sec with max_k_p_r 128. But,... 
after copying big files I get ext3-fs erros, cannot read inode etc and a
bus error. Bumm!

Maybe it runs better with your harddrives.

Marcus

Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Prakash K. Cheemplavam]

Marcus Hartig wrote:
> Prakash K. Cheemplavam wrote:
> 
>> I have a similar problem: With 2.4.22-ac3 I had 37mb/sec with my 
>> Samsung HD and 49MB/sec with IBM/Hitachi, now with 2.6 (all I tried, 
>> including test9-mm2) I had only 20mb/sec for Samsung and about 
>> 39mb/sec for the IBM. Motherboard is Abit NF7-S Rev2.0, as well, so 
>> same situation with the siimage 1.06 driver. I wanted to run some dd 
>> tests as well, but it is a real performance hit. Playing with 
>> readahead or other hdparm options didn't help either.
> 
> 
> I get a tip from Mark Hahn to set the pci latency to 64. And wow, with 
> fedora 2.4.22 kernel I get then 41MB/sec with max_k_p_r 128. But,... 
> after copying big files I get ext3-fs erros, cannot read inode etc and a
> bus error. Bumm!

Is there a way to change the latency within Linux? I mean I don't want 
to ruin my Windows, as it works w/o problems. Nevertheless I rather make 
a backup of my Linux install before messing with that...

Prakash

Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Marcus Hartig]

Prakash K. Cheemplavam wrote:

> Is there a way to change the latency within Linux? I mean I don't want 

With setpci and lspci?

> to ruin my Windows, as it works w/o problems. Nevertheless I rather make 
> a backup of my Linux install before messing with that...

Thats always good... ;-)

Marcus

-- 
today until 20:15 CET 2003 Scotland soccer fan

Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance

[Prakash K. Cheemplavam]

Marcus Hartig wrote:
> Prakash K. Cheemplavam wrote:
> 
>> Is there a way to change the latency within Linux? I mean I don't want 
> 
> 
> With setpci and lspci?

Well, I treid setting latenc to 64 even 128, but hd-speed didn't 
improve. 23MB/s was max. What else did you set? I just set the siimage 
controller's latency higher.

Prakash